dtwgan



UNITED sfr Tns QFEIQE4 WILLIAM H. DUNGAN, or RooKLAiiE," INDIANA.

SPECIFICATION forming-part f-Letters Patent Ne. 318,095, dated, May 19, 1885.

- tii tfefifiiad Junclallil. Iov nioaei.)

To all hodjicoficemtfl 7' Be it known that I, WILIZIAIILH'. DUNGAN, of Rocklanerlv '04,: county.-of Johnson, and

State of Indiana, have.invented certain new) and usefullmproyementsinHarrows,of which. I

spondingholes'intheirverticaldparts,through the following is a specification. A

My said; invention. consists. in certain improvements .in. the ..;co.nstr.uction of liarrows,

whereby they are rendered reversible and ad'-' IO justable, and whereby the teeth are adapted to be easily'removed and replaced, as will be hereinafter more particularly described.

Referring to the accompanying drawings, which are made a part hereof, and"'onjwhicl1 I5 similar letters of refereniceindicate similar parts, Figure 1 is a top or plan view of a harrow embodying] my said invention, the teeth and levers being in vertical position; Fig. 2, an end elevation of the same, the teeth and levers being inclined as when in use; Fig. 3, a longitudinal vertical sectional view looking toward the right from the dotted line z z in Fig. l; and Fig. 4, a transverse vertical section on the dotted line 3/ y when the position of the teeth, &c., has been reversed from that shown in Fig. 2.

In said drawings, the portions marked A represent the harrowteeth; B, the bars or rails of the frame; 0, upwardly-projecting levers connected to one of said rails; O 0 G shorter levers or bars projecting upwardly from the other rails; D D, cross-barsconnecting said upwardly-projecting levers or bars together, and E a toothed segment. Theteeth A are in themselves only ordinary teeth, but are provided with apeculiar fastening. This fastening consists of the clip a and link-wedge a, the former of which encircles the tooth and passes through the rail B, and the latter of which passes down through said clip, alongside said rail, and draws it tightly against said tooth, thus clamping it between the clip and the rail, and holding it firmly in position.

-The clips are enlarged at the ends, through which the teeth pass, so that they will remain securely in the rails when the teeth are withdrawn. The wedges are formed like split links, so that when placed in the clips and sprung together they will be held there securely. This arrangement keeps all the other parts of the harrow in readiness for use, notwithstanding the removal or absence of any or 7 all of the teeth,and secures said against loss. The barscr rails B;are preferably con- ,structed of angleairomas shown. They are proyided with holes in theinhorizontal -parts;,jthrough which the-teeth pass, and-with correwhich the clips pass, as willbe readily seen by v an examinationof the'drawings; They arosecured together and operated; as will be;pres-ff fently described. The levers "Gare; secured firmlyjto oneof the bars B, and extenduppasa the other frame-work and "terminate infhan-- jdles, wherebythe harrow is adapted'to beadjusted.and reversedz, The-lower ends of these": *levers, together with thebars (15-0 -16 consti tute the upright portions of the frame-work. Said upright portions are connected by the cross-bars D D, and aresecured thereto bythe 7o pivots d d. The joints thus formed permit the position of the parts to be changed or adjusted by throwing the levers 0 back and forth,

as will be seen by a comparison of Figs. 2 and 4 of the drawings. It will be understood, of course, that the limit of adjustment is not indicated by the positions shown by said drawings, but that the teeth may be adjusted to a much more nearly horizontal position in either direction, if desired. The frame is heldin the position desired by an engagement between latches on the levers O and the notched segments E, as will be presently described. The bars D D are plain cross-bars, and serve to connect the upright portions 0 C 0 O and 8 5 thus maintain the proper distance between the bars or rails B. The bar D also serves to support the segment E. The segment E is an ordinary toothed segment or segmental rack, and serves to secure the levers O in position by means of the latches C on said levers, having engaging-points c, which engage with the notches e on said segments. Said latches are pivoted to the levers by the pivots c, and are adapted to be thrown out of engagement by pressing the upper ends in toward the handles of said levers. Said latches are connected together by a rod, 0, which causes them to operate simultaneously, and thus engage or release both the segments at one operation. I00

The operation of my improved harrow may be recapitulated as follows: The teeth are first set at the desired angle by means of the levers, and secured by the segments and latches.

springs, they automatically re-engage with the segments. The teeth are thus easily adjusted to any angle desired. By means of the clips a and Wedges a the teeth are also rendered separately adjustable, and may be used with as much or as little of their length projecting as is desired. In case it is desired to drag the ground more than to harrow it, they can be arranged to project very slightly, and the rows can be arranged to project to different lengths. In short, any adjustment may be made that may be wished for to accommodate the requirements of different soils or different crops.

In the construction I find angle-iron to be a superior material for the bars, being both light and strong, and easily prepared for use.

I am aware that mechanism for varying the angle of the teeth has heretofore been employed in harrows; I am also aware that angle-iron has been used for bars of harrowframes, and that clips and wedges have here- 1. The combination, in a harrow, of the teeth A, bar B, formed of angle-iron, said bar having a perforation in its horizontal part, through which the teeth are inserted, and clips a in its vertical part, which surround the upper end of said teeth, said clip a, and the link-shaped wedge 04, inserted in the rear end of said clip behind the rear face of the vertical portion of the bar as a means for drawing said clip tightly against the tooth and securing it in position, substantially as set forth.

2. In a harrow, the combination of the teeth A, angle-iron bars B, clips a, and wedges a, as a means for securing said teeth in said bars, levers O, connected-to one of the bars B at their ,lower ends, uprights O G 0 extending up from said bars B, cross-bars D D, connecting the levers O, and uprights G O O, segments E, and a bar, 0 connecting a latch upon the lever at one end of the harrow with a similar latch at the other end, whereby both latches may be disengaged simultaneously and from one side of the harrow, said several parts WVILLIAM H. DUNGAN. [L.s.]

In presence of- G. BRADFORD, OHAs. L. THURBER. 

